• Natural Product Sciences
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• v.4 no.1
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• pp.15-22
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• 1998

'Banafsha' is an important herbal drug of indigenous systems of medicine. Flowers of Viola odornta L. (Violaceae) are considered to constitute the genuine drug 'Banafsha'. However, due to limited distribution of this plant, another species of Viola, i.e. V. pilosa having almost similar medicinal properties, is mostly used under this vernacular instead. Ethnobotanically also different species of Viola i.e. V. odorata, V. pilosa and V. betonicifolia are used for various ailments at different places in our country. In the present study two species of Viola, namely V. pilosa and V. betonictfolia along with the commercial samples of 'Banafsha' were studied and authenticated. It was observed that the market samples procured from Dehradun, Mumbai, Lucknow, Palampur, Ramnagar and Ranikhet showed close resemblance with Viola pilosa in having similar morphological characters like uniseriate hairs on the ovary, geniculate and clavate style, truncate stigma and almost similar TLC profiles. On the other hand the Almora sample was identified as Viola betonicifolia by the presence of large purple flowers, clavate style and convex stigma forming hump like structure. However, the market sample procured from Pathankot was found to be a mixture of two species of Viola namely, V pilosa and V. odorata having dominance of the former species.

• Proceedings of the Korean Society of Crop Science Conference
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• 2022.10a
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• pp.5-5
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• 2022

A little more than a decade ago, the International Rice Research Institute (IRRI) started on a journey of revitalization through adopting the concept of systems research. Instead of being just a rice breeding and affiliated sciences research center, it expanded its vision of impact on the rice-based food systems. In almost the same vein the OneCGIAR has also attempted to aggregate the commodity-based research into food systems-based research that critically caters to specific overarching 'Impact and Action Areas'. Incidentally, IRRI's structure and operations map on to these Impact and Action areas very well. Hence, IRRI's research directly caters to societal, economic and environmental sustainability. It does so through a coherent pipeline that spans the upstream discovery component all the way to product delivery, dissemination, and impact assessment. While a circular 5D-pipeline of demand, discovery, development, deployment and distinction attend to the ground-level realities of demand, development and acceptance of a product, the Four Flagships attend to proximal deliverables under challenging conditions of change brought about by the CGIAR restructuring and COVID-19. Prioritizing specific products under the flagships ensures that institutional support is available to fast-track the deliverables. Clear examples now highlight the potential of such approaches. Thus, despite the challenges of climate change, political unrest of war and global medical encumbrances, the stable partners of IRRI like Korea have helped to come close to deliverables.

• Proceedings of the Korea Crystallographic Association Conference
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• 2003.05a
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• pp.6-6
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• 2003

Highly crystalline 5H-polytypic form of sp3-bonded boron nitride (BN) was grown by pulsed-laser-vaporization of BN, where synchronous reactive-plasma packets assisted the crystal growth in the vapor phase. The structure of the product crystallites (˙5 micrometers) was confirmed by using transmission electron diffraction and electron energy loss spectroscopy. This material proved to have a sharp and dominant band at 225 nm by cathode luminescence at room temperatures and corresponding monochromatic images revealed that they uniformly emitted the ultraviolet light. Considering that cubic BN has already been doped as p- and n- type semiconductors, this material may be applied to the light-emitting devices working at almost the deepest limit of the UV region that is functional without vacuum.

• Journal of Sensor Science and Technology
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• v.29 no.5
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• pp.303-311
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• 2020

Nondispersive infrared CO₂ gas sensor was developed after the simulation of optical cavity structure and assembling the optical components: IR source, concave reflectors, Fresnel lens, a hollow disk, and IR detectors. By placing a hollow disk in front of reference IR detector, the output voltages are almost constant value, near to 70.2 mV. The absorbance of IR light, F_a, shows the second order of polynomial according to ambient temperatures at 1,500 ppm. The differential output voltages and the absorbance of IR light give a higher accuracy in estimations of CO₂ concentrations with less than ± 1.5 % errors. After implementing the parameters that are dependent upon the ambient temperatures in microcontroller unit (MCU), the measured CO₂ concentrations show high accuracies (less than ± 1.0 %) from 281 K to 308 K and the time constant of developed sensor is about 58 sec at 301 K. Even though the estimation errors are relatively high at low concentration, the developed sensor is competitive to the commercial product with a high accuracy and the stability.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.13 no.6
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• pp.37-45
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• 2014

Ball valves are used as a key element in the process industries. The industrial development of valves has increased steadily, but continued improvement requires high design reliability and long service life. Currently, the development of high performance valves is not easy because of the lack of relevant technology in Korea. Valves are being imported at a level of up to 58 percent of the domestic market, which represents a value of almost 7 million US dollars. Therefore, in this work, the improvement of the design and performance of industrial valves has been studied in an attempt to achieve valves that will have longer service life and better output during operation. The structural stability was evaluated using the ANSYS FSI (Fluid-Structural Interaction) module. Moreover, to obtain maximum product reliability, torque analysis simulation was performed to compare and experimental results. The simulation results were used to predict the change in torque by changes in shape, thereby reducing the time and cost of manufacturing a number of prototypes for experimental validation.

• Applied Chemistry for Engineering
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• v.8 no.5
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• pp.811-815
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• 1997

The present work describes the effect of dry grinding of a mixture composed of $Y_2O_3$, $BaCO_3$ and CuO powders with a planetary ball mill before heat treatment on crystal structure and superconductivity in the $YBa_2Cu_3O_{7-y}$. The specific surface area of the ground product of mixture decreased with an increase in the grinding time, after showing an upward trend up to 60 minutes of grinding. The critical current density, which was influenced by the grinding time of mixture, indicates the maximum value of about $150A/cm^2$ in the case of 60 minutes grinding, while the critical temperature, which were around 90K, for the sintered bodies were almost independent of the grinding time.

• Archives of design research
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• v.13 no.3
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• pp.253-260
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• 2000

Writing instruments or pens have many features not commonly found in other products in terms of their structure and characteristics of use. That is, different pens are usually composed of almost identical parts and/or structure. The fact they work always grabbed in hands considered, the ergonomic design of pens is essential. Reports indicate consumers evaluate pens in writing comfort above all other factors when they select pens. Among various factors related to writing comfort, it shouldspecifically be the ergonomic improvements that design can effectively contribute to. Studies on the pen-grabbing comfort or on approaches based on the understanding of human-work relationships generally lack when compared with fashion-conscious aesthetic approaches to pen design. This paper, therefore, aims to reestablish the ergonomic design criteria including the necessities of specifications required to provide indispensable data for the pen design processes. Consequently, it should produce basic set of information for systematic approach to pen design and development, which is commonly called'concurrent engineering'. Also a cost-effective solution for product diversification strategy could be attributed to a modular system database based on the result of this attempt.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1997.11a
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• pp.47-50
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• 1997

Drug development began with the finding of biologically active compounds which are obtained by chemical synthesis or from natural sources. The advent of Combinatorial Chemistry is recognized as a strategy which has a potential to change the methodology of research and development(R&D) of new drugs. Drug development has been carried out with diverse strategies. In the past several decades a variety of new methodology have been introduced in R&D. Random screening of accumulated synthetic samples which had been synthesized for development of other drugs led to the discovery of new drugs. The typical examples are anti-asthma drug trimethoquinol and calcium antagonist diltiazem. (herbesser). In particular the latter drug has been used as a calcium antagonist worldwide, however it was first synthesized to find new tranquilizer and this is the reason why diltiazem has benzodiazepam skeleton. The random screening contributed in the finding of new drugs were carried out with whole animal test and it is a standard methodology in R&D of new drugs. Aspirin is the first synthetic non-steroidal antiinflammatory drug(NSAID) and has been used for more than one hundred years. It is the first example of drug developed from natural product. Salicin is the main constituent of willow bark which had been used in Europe for a long time to treat arthritis and aspirin was developed from salicin. Most of NSAID used clinically were developed from the structure of aspirin, however it took 70 years to clarify why aspirin exhibits its antiinflammatory, analgesic and antipyretic activities. The target of aspirin is cyclooxygenase(COX)which is the first enzyme involved in arachidonate cascade leading to the production of prostaglandins(PG) and thromboxan(TX). Side effect of aspirin causing ulcer in stomach is rather serious problem, since aspirin is so popular drug easily obtained in drug store(OTP). This problem is now going to be solved by a new finding on COX, which have two different types, one is constitutionally expressed COX 1 in almost all organs and the other is inducible COX 2. COX 2 is the responsible enzyme in inflammation etc and now the search of COX 2 specific inhibitors is the target of R&D of next generation NSAID.

• The Journal of the Korea Contents Association
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• v.15 no.12
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• pp.141-152
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• 2015

If we look into genre movie, we can see that almost similar forms are repeated in a movie. Such similar elements are largely divided into three units from a mass of story to a very small camera angle. Those can be explained as Formula, Convention, and Iconography. Among those three, convention means custom and it is a structure or an incident in which one story can be divided into second one. Convention is an incident visualized in individual genre, and a movie director tunes audiences through the incident. The director leads a familiar story but all of a sudden, he transforms the familiar scene to a new story. As a product established from the beginning of movie history, movie convention helps communication between audiences and a director. Audiences familiarize themselves with movie convention through repeated activities of watching movies, and the director utilizes it to provide audiences with familiarity. Director Bong Joon-ho not only tunes audiences through traditional convention but also creates a new art work through transformation of convention. A study is conducted on how he used traditional convention and transformation to get a new idea and to engage in his work through his work .

• Journal of architectural history
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• v.17 no.5
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• pp.39-53
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• 2008

This study aims to investigate and analyze the plan and structural system of 4 kan(間) by 4 kan(間) square church built in early 20th century. At that time, three kinds of traditional wooden structure church had been built under the circumstances of transitional era : Basilica style such as Ganghwa Anglican Church, 'ㄱ' shaped style such as Keumsan Church and $4{\times}4$ Square style such as Bukok Church and Jacheon Church that are concerned in this study. Traditional plans and structural system were mixed with new religious function and transformed into korean peculiar style. $4{\times}4$ Square style is a residual product in that process. Despite of it, little concerns on it till now. The results of this study are described as follows. 1. The plan of these $4{\times}4$ square churches is divided into three areas : cathedra($1{\times}1$), attendance($4{\times}2$), and intermediation($4{\times}2$). The location of cathedra is commonly the opposition part of main gate and projected out of the building. Attendance area was also divided into two, man and woman, because of keeping a distance with each other. 2. The structural system of these $4{\times}4$ square churches are somewhat different because of their size and roof style. In the case of Bukok church, $4{\times}4$ square fall off $3{\times}3$ and $2{\times}2$ gradually and turn into paljak(八作) roof, which enable us to get in traditional entering methods. On the contrary, Jacheon church use hipped roof but almost alike pyramidal roof, which could make us not to recognize entering in the aspect of gable part.